Perhaps you should try some spelling variations:
dang xay » van xay
thai cua » than cua, tai cuc, tri cua
dang van » hoang van, hang va
te sach » toc sach
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
hieu va » lieu va, hieu qua
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y ((dang xay) OR (dang van)) hoi. hieu va cac du ((va hanh) or (va danh)) thai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((dang xay) OR (dang van)) hoi. hieu va cac du ((va hanh) OR (va danh)) thai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((dang xay) OR (dang van)) hoi. hieu va cac du ((va hanh) or (va danh)) thai cua te".
• Adding a wildcard symbol may retrieve word variants: te sach y ((dang xay) OR (dang van)) hoi. hieu va cac du ((va hanh) or (va danh)) thai cua te*.